New Circuits Page 75
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This circuit is a digital voltmeter with LED display. It`s ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199. 9V with a....
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A few old N64 controllers lying around and figured that it would be pretty cool to use them to control other things. In this article I will describe in detail every step I took to achieve this. I`ve used a PIC microcontroller, but it should not be too hard....
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Hello sir, I need to design an astable multivibrator and supposed to calculate the maximum and minimum frequency generated at the output. Can you....
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The heater element (not shown) is connected in series with two back to back 16 amp SCRs (not shown) which are controlled with a small pulse transformer. The pulse transformer has 3 identical windings, two of which are used to supply trigger pulses to the....
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In this application note, we create a heart rate monitor by using one IR LED and phototransistor pair and observing the waveform at the phototransistor output. This is intended for illustrating a typical light sensor application and not intended for actual....
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The following circuit shows about 10 Dancing LEDs Electronic Circuit Diagram. This circuit based on the LM358 IC. Features: IC1A amplifies about ....
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When a keypad switch is pressed - this circuit will reproduce its value in Binary Coded Decimal from. I`ve used a 12-key pad. But it may be expanded to 16 keys - to provide Hexadecimal to BCD conversion. The circuit is constructed in two parts. There`s a....
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An 5 pole elliptic low pass filter (impedance: 50Ohm, -6dB cut off frequency 33MHz) connects the antenna signal to the diode ring mixer, a traditional SBL-1, which offers good performance even below 500kHz. A high pass / low pass diplexing filter leads the....
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It plugs into the USB port and is just the shot for checking motherboard switch and jumper settings. Many readers will remember a commercial product of a few years ago, the "Itty Bitty Book Light". It was designed to clip over the top of a book to give just....
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The circuit was designed to create an electronic oscillator known as Wien Bridge Oscillator which can be used for the creation of low frequency sine wave....
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try another op amp. I could be changes in the input bias current that is causing a strange voltage drop across the 10k resistors. The LM358 is not really a high quality op amp it`s the diodes in the feedback loop. that`s a poor choice of limiter for a sine....
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This is transistor inverter circuit diagram 100watt it sizes are easy circuit. Because of use the all transistor, have no the integrated circuit. It performs to modify from battery 12V be 220V 50Hz signal square wave. By the circuit works with transistor....
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Hi everyone! I found this circuit in my computer (i don`t remember where i got it and when) and i was wandering if it`s able to dim 220V LED BULBS? it ....
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This design is based on that of Andrew Bruno. His design appeared under the name of "bruno-if". My contribution was to provide Postscript files for a Printed Circuit Board. This circuit is quite old and goes back to the days of NMEA-0180 and 0182. Note that....
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This is Power Audio Amplifier circuit based on STK400xx series. It`s will give you very good quality of sound this circuit is unexpensive too since STK40xx series have low price. It is easy we make a power amplifier using only few external components. The....
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This circuit provides a visual 9 second delay using a 7 segment digital readout LED. When the switch is closed, the CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output held high..
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This simple circuit drives 6 LEDs in `Knightrider scanner mode`. Power consumption depends mainly on the type of LEDs used if you use a 7555 (555 CMOS version). We are not responsible for any injuries or damage caused by information from this website!....
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The circuit in view (D) has all three requirements for an oscillator: (1) amplification, (2) a frequency-determining device, and (3) regenerative feedback. The oscillator in this schematic drawing is a tuned-base oscillator, because the fdd is in the base....
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Radio-Circuits has raised the bar with this site. Unlike any other circuit site on the worldwide web, they have taken 10 of the most clicked into FM Transmitter circ....
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This TDA7056 power audio amplifier electronic circuit diagram project will provide a maximum output power of 1 watt into a 8 ohms load using a 6 volts power supply, or a maximum output power of 3 watts into a 16 ohms load using a 11 volts power supply. As....
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As an integral part of an advanced computer science course in microcomputer systems it was thought that students could benefit from the design of a single board computer system based on a readily available microprocessor. This led to the project that is....
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Simple pathway lighting that would provide illumination for the path at night. Extension for the Solar garden Light. The torroid is bifilar wound. The Torr...
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You should have the GNU tools configured, built, and installed on your system. In this chapter, we present a simple example of using the GNU tools in an AVR project. After reading this chapter, you should have a better feel as to how the tools are used and....
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To swap charge in either direction between unevenly loaded positive and negative battery buses, you need an inverting dc transformer. One implementation is the symmetrical flyback converter shown in Figure 1. The circuit can generate a negative output from a....
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This project can be used for a quiz with up to 4 contestants (or teams). Each contestant has a trigger push-switch and LED. When a trigger switch is pressed it lights the corresponding LED, sounds the bleeper and prevents the other trigger switches from....
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Today, it is by far the most common preamp tube used for electric guitar amplification and there is an almost overwhelming supply of current production options to choose from. The purpose of this comparison is simply to provide guitar players with a frame of....
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They implemented it in the higher frequency L band 1452-1492 MHz whereas EU, AU and GB are in VHF Band III (174-230 MHz) anyway it failed for whatever reasons, and thanks again for trying the APP. Mickz your app works perfectly here but I get no dab....
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It uses standard components, gives a good sine wave and is fairly immune to the type of op ampit is designed around. It can, however, be misunderstood, and over simplifications as to its operation can leave the designer thinking that it is not as well....
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The following circuit show about Circuit Diagram Of Motor Control Unit. This circuit based on the LM317 IC. Features:diodes protect the regulator, ...
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The op-amp IC1D shapes the frequency response to amplify those frequencies produced when motion is detected and rejects all others, such as those due to noise or slow temperature changes. When IC1D outputs a voltage higher than 1. 67V, it forces pin 8 and....
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The first IC (left) is wired to work around 1Hz. The 47uF capacitor is charged and discharged periodically and the voltage across it gradually increases and decreases periodically...
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This is a IBM ThinkPad T40 Power control circuit. This circuit based on the MAX1631 IC. MAX1631 IC is a Multi-Output, Low-Noise Power-Supply ....
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DIY TDA2050 Non-Inverting Chip Amplifier (chipamp) Project constructed on a protoboard..
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The H-bridge is a circuit used in electronic control of high current devices, particularly where the device polarity may be reversed, e. g. DC motors. The name comes from the fact that the circuit typically looks like a letter "H". The circuit shown has four....
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A common topology for DC-AC power converter circuits uses a pair of transistors to switch DC current through the center-tapped winding of a step-up transformer Examine these checkplot images from a PCB drafting program, for a control board based on this....
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I am rewiring my entire house after a major malfunction of two antique knob and tube circuits. I`m up against a challenge with some outdoor lights. Here`s the situation: I have a detached garage. It has a porch light over the service door, and it works on a....
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Make a sound card is no more a complex issue. If you use great IC PCM2702 from BURR BROWN / Texas Instruments you can create a fully functional USB sound card. This sound card can be powered from USB port and has one stereo output. You don ½t need to install....
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There are numerous posts on Instructables about how to make a flickering LED candle. This is my version. The project requires the following components...
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The latest addition to my collection of Infra Red (IR) Repeater circuits. The Mark 5 is a much improved version of the Mark 1 circuit and has increased range...
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Phonographs are gradually becoming a rarity. Most of them have had to yield to more advanced systems, such as CD players and recorders or (portable) MiniDisc player/recorders. This trend is recognized by manufacturers of audio installations, which means that....
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This circuit was submitted by Lazar Pancic from Yugoslavia. The sound card for a PC generally has a microphone input, speaker output and sometimes line inputs and outputs. The mic input is designed for dynamic microphones only in impedance range of 200 to....
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The LED meter is simpler and smaller than it`s analogue counterpart, and is very common in audio equipment. This version is based on a National Semiconductor IC, and uses the logarithmic version. Each LED operates with a 3dB difference from the previous one,....
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The master mode selection switch is IC6 which switches the 4 mode LEDs (which also correspond to the measured unity, i. e. kHz, counts, milli-seconds or seconds) as well as the input for the divider and the counter : For standard frequency counter mode....
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P89LPC901, Vacuum Cleaner, Soft start, Harmonic suppression, Low cost A low cost P89LPC901 based vacuum cleaner system is introduced in this application note. Design hardware and software are fully discussed. This system CAN also guide the design of other....
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This article focuses on a minimal resource microcontroller implementation for a 3 phase BLDC motor, closed loop speed motor controller application based on a Microchip PIC12 device. It shows how minimisation techniques can reduce the number of I/O pins to....
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This is a minimal circuit which I built to individual of my audio amplifier projects to control the presenter output relay. The end of this circuit is to control the relay which turns on the speaker output relay within the audio amplifier. The impression of....
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If sine wave is very essential it can be derived from the square wave. One of the most popular IC used to generate clock from Maxim Integrated Products is MAX9471. Please refer this circuit below to design a clock generator out of this device. This device....
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A Cmos Based Motorcycle Alarm Circuit This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automaticall....
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This application note describes a controller for a 200 W, 24 V Brushless DC (BLDC) motor used to power an electric bike. The design uses Zilog`s Z8 Encore! MC Z8FMC16100 Microcontroller unit (MCU) and associated circuitry to implement motoring control,....
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The old 555 timer will certainly work given the specs you provided, and that`s the way to go if you are sure this is precisely the problem you want to solve. By the way, as Steven mentioned, the general name for this type of timing block is monostable....
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A PB-12N23PW-05Q buzzer and I`m trying to use it with ATmega 162. I can`t connect it directly to pin, because from what I`ve read from 162`s datasheet, it can source at most 20 mA. The buzzer takes 50 (or around 25, if we take a look at the graph), so I....
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This circuit is able to handle nine independent telephones (using a single telephone line pair) located at nine different locations, say, up to a distance of 100m from each other, for receiving and making outgoing calls, while maintaining conversation....
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Nissan Sentra 1.6 Liter Manual Transmission Starter Circuit Wiring Diagram...
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The Spartan-3an board has external 5v Relay interfacing, indicated as in Figure. ULN2803 is used as a driver for FPGA I/O lines, drivers output connected to relay modules. PTB connector provided for external power supply if needed...
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This is a simple NiCd battery charger powered by solar cells. A solar cell panel or an array of solar cells can charge a battery at more than 80 % efficiency provided the available voltage exceeds the fully charged` battery voltage by the drop across one....
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MC44BS374CA: PLL Tuned UHF and VHF Audio Video High Integration Modulator MC44BS374CA The MC44BS374CA Audio and Video Modulator is for use in VCRs, set-top boxes, and similar devices. By Freescale Semiconductor, Inc ..
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The circuit was designed to create a frequency generator that consists of 7 steps during the operation. Crystal Oscillator an electronic circuit made of....
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The following circuit shows about Simple Battery Charger With The Temperature Sensor. This circuit based on the LM350 IC. Features: negative ....
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This circuit of multimedia speakers for PCs has single-chip-based design, low-voltage power supply, compatibility with USB power, easy heat-sinking, low c....
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CD4538 is a dual Monostable Multivibrator. When you trigger the chip the output sends off one single pulse or one high-low event. The T+ pin 4 of U1a is the positive edge trigger or raising edge trigger input, the T- pin 5 is falling edge or negative edge....
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I got this from a dosing pump control circuit. we use cool IC is no. lm317 circuit, It can uses with power supply source 24VDC and adjust voltage output 1.25V....
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ICs that in the past were far too expensive for the hobbyist tend to be more favourably priced these days. An example of this is the AD8099 from Analog Devices. This opamp is available for only a few pounds. The AD8099 is a very fast opamp (1600 V/ms) and....
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Stepper motor is a simple way to make a motion control with high precision. A stepper motor control circuit is needed to make stepper motor works. A stepper....
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If the total circuit resistance can be reduced significantly to less than 0. 1 Ohm & a load of 0. 4 Ohm or less is connected, over 1 Kilo Watt of free electrical energy can be obtained. There are two discrete voltage regulating stages, one is shown in the....
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Using LM380 and few external components can be designed a simple audio amplifier that has many features like : wide supply voltage range, 150k © input impedance, low distortion, 1. 3A current capability. ..
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Voltage fluctuation is a serious issue in every home. Due to some reasons our supply voltage may rise above 110V or 230V. Flow of this high electricity may lead to the damage of our home electrical devices. Have you thought how electrical protection is....
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TDC1808/TDC1809 is a pair of wireless remote control transmitter and receiver component. They use an internal antenna, transmitting digital signals or analog signals. It is suitable for a variety of wireless remote control device. The features are small....
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This circuit is intended for children fun, and can be installed on bicycles, battery powered cars and motorcycles, but also on models and various games and toys. With SW1 positioned as shown in the circuit diagram, the typical dual-tone sound of Police or....
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This circuit is intended to program AVR controllers such as the AT90S1200 via the parallel port. The circuit is extremely simple. IC1 provides buffering for the signals that travel from the parallel port to the microcontroller and vice versa. This is....
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All DAC boards includes supply part. It is enough to connect only power transformer. Here I offer board for toroidal 10VA transformer manufactured by Talema which has pins to the PCB and it has very small radiation of electromagnetic field to the....
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A variable power supply with adjustable voltage and current outputs made with the L200 regulator. Using the versatile L200 voltage regulator, this power supply has independent voltage and current limits. The mains transformer has a 12volt, 2 amp rated....
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For some ten years Texas Instruments have been developing solid state speech technology with the result that speech can now be produced which faithfully preserves the character of the spoken voice including intonation, accent, dialect, and pitch. Linked to a....
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WB5LUA described GaAsFET preamps for several microwave bands which included an active bias circuit for the GaAsFET. Many devices have come along since then which offer better performance, but require a bias point with different current and voltages. It isn`t....
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The IC ELM446 is an 8 pin digital divider integrated circuit, that provides both 50Hz and 1Hz outputs from a common 3. 58MHz NTSC colourburst crystal. Externally, the designer need only provide the crystal and two appropriate loading capacitors, as well as a....
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The following circuit shows about Bass And Treble Controller Circuit. This circuit built based on the classic Baxandall tone control circuitry ....
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Make H-Bridge for controlling DC brushed motor with PWM. One bridge will control 1 DC motor. Bridge will have 3 inputs: A, B and PWM. A and B will be direction control while one PWM signal will control motor speed no matter in which direction it will spin.....
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This is a CMOS-compatible (and hopefully also TTL) input featuring over- and under-volatage protection. Schmitt triggers are used to allow for input with long transition times. Verified to work up to 30MHz...
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LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems....
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This circuit can be used to operate an electric strike or an electromagnetic lock on a door. It is not the door being opened/closed, but a small electromagnetic strike which unlocks the door. The opener has the following features currently programmed in....
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Simple, highly sensitive capacitive ON/OFF switch pads change the state of a latch and turn on an LED without requiring actual physical human contact. The pad may be insulated. A range of 12mm is easily obtained and sensitivity is adjustable. Central is the....
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The digital sine wave generator (oscillator) circuit has the advantage that only few components are needed to generate signals with high amplitude constants and variable within a very wide range of frequencies. The circuit shown here generates a sinewave....
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P1 is the manual control of the corresponding parameter (e. g. tune for a VCO, frequency for a VCF, manual gain for a VCA, manual phase shift for a phaser and so on). P1 generates the voltage U1. J1 is the (first) input socket for the external control....
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[caption id=attachment_45 align=alignnone width=500 caption=Serial RS232 to USB][/caption] This is simple RS232 Serial to USB Converter that...
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When I began the design of this amp, my goal was to make a product better suited for the reproduction of complex music and voice. Although I emphasize the high electrical properties, the most important requirement is to create a superior sound, vivid images....
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Hello, My goal is to control a 12 VDC device (on/off) from a microcontroller using a relay card. The relay needs 12 VDC operating power (I use the....
This circuit is a digital voltmeter with LED display. It`s ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199. 9V with a....
A few old N64 controllers lying around and figured that it would be pretty cool to use them to control other things. In this article I will describe in detail every step I took to achieve this. I`ve used a PIC microcontroller, but it should not be too hard....
Hello sir, I need to design an astable multivibrator and supposed to calculate the maximum and minimum frequency generated at the output. Can you....
The heater element (not shown) is connected in series with two back to back 16 amp SCRs (not shown) which are controlled with a small pulse transformer. The pulse transformer has 3 identical windings, two of which are used to supply trigger pulses to the....
In this application note, we create a heart rate monitor by using one IR LED and phototransistor pair and observing the waveform at the phototransistor output. This is intended for illustrating a typical light sensor application and not intended for actual....
The following circuit shows about 10 Dancing LEDs Electronic Circuit Diagram. This circuit based on the LM358 IC. Features: IC1A amplifies about ....
When a keypad switch is pressed - this circuit will reproduce its value in Binary Coded Decimal from. I`ve used a 12-key pad. But it may be expanded to 16 keys - to provide Hexadecimal to BCD conversion. The circuit is constructed in two parts. There`s a....
An 5 pole elliptic low pass filter (impedance: 50Ohm, -6dB cut off frequency 33MHz) connects the antenna signal to the diode ring mixer, a traditional SBL-1, which offers good performance even below 500kHz. A high pass / low pass diplexing filter leads the....
It plugs into the USB port and is just the shot for checking motherboard switch and jumper settings. Many readers will remember a commercial product of a few years ago, the "Itty Bitty Book Light". It was designed to clip over the top of a book to give just....
The circuit was designed to create an electronic oscillator known as Wien Bridge Oscillator which can be used for the creation of low frequency sine wave....
try another op amp. I could be changes in the input bias current that is causing a strange voltage drop across the 10k resistors. The LM358 is not really a high quality op amp it`s the diodes in the feedback loop. that`s a poor choice of limiter for a sine....
This is transistor inverter circuit diagram 100watt it sizes are easy circuit. Because of use the all transistor, have no the integrated circuit. It performs to modify from battery 12V be 220V 50Hz signal square wave. By the circuit works with transistor....
Hi everyone! I found this circuit in my computer (i don`t remember where i got it and when) and i was wandering if it`s able to dim 220V LED BULBS? it ....
This design is based on that of Andrew Bruno. His design appeared under the name of "bruno-if". My contribution was to provide Postscript files for a Printed Circuit Board. This circuit is quite old and goes back to the days of NMEA-0180 and 0182. Note that....
This is Power Audio Amplifier circuit based on STK400xx series. It`s will give you very good quality of sound this circuit is unexpensive too since STK40xx series have low price. It is easy we make a power amplifier using only few external components. The....
This circuit provides a visual 9 second delay using a 7 segment digital readout LED. When the switch is closed, the CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output held high..
This simple circuit drives 6 LEDs in `Knightrider scanner mode`. Power consumption depends mainly on the type of LEDs used if you use a 7555 (555 CMOS version). We are not responsible for any injuries or damage caused by information from this website!....
The circuit in view (D) has all three requirements for an oscillator: (1) amplification, (2) a frequency-determining device, and (3) regenerative feedback. The oscillator in this schematic drawing is a tuned-base oscillator, because the fdd is in the base....
Radio-Circuits has raised the bar with this site. Unlike any other circuit site on the worldwide web, they have taken 10 of the most clicked into FM Transmitter circ....
This TDA7056 power audio amplifier electronic circuit diagram project will provide a maximum output power of 1 watt into a 8 ohms load using a 6 volts power supply, or a maximum output power of 3 watts into a 16 ohms load using a 11 volts power supply. As....
As an integral part of an advanced computer science course in microcomputer systems it was thought that students could benefit from the design of a single board computer system based on a readily available microprocessor. This led to the project that is....
Simple pathway lighting that would provide illumination for the path at night. Extension for the Solar garden Light. The torroid is bifilar wound. The Torr...
You should have the GNU tools configured, built, and installed on your system. In this chapter, we present a simple example of using the GNU tools in an AVR project. After reading this chapter, you should have a better feel as to how the tools are used and....
To swap charge in either direction between unevenly loaded positive and negative battery buses, you need an inverting dc transformer. One implementation is the symmetrical flyback converter shown in Figure 1. The circuit can generate a negative output from a....
This project can be used for a quiz with up to 4 contestants (or teams). Each contestant has a trigger push-switch and LED. When a trigger switch is pressed it lights the corresponding LED, sounds the bleeper and prevents the other trigger switches from....
Today, it is by far the most common preamp tube used for electric guitar amplification and there is an almost overwhelming supply of current production options to choose from. The purpose of this comparison is simply to provide guitar players with a frame of....
They implemented it in the higher frequency L band 1452-1492 MHz whereas EU, AU and GB are in VHF Band III (174-230 MHz) anyway it failed for whatever reasons, and thanks again for trying the APP. Mickz your app works perfectly here but I get no dab....
It uses standard components, gives a good sine wave and is fairly immune to the type of op ampit is designed around. It can, however, be misunderstood, and over simplifications as to its operation can leave the designer thinking that it is not as well....
The following circuit show about Circuit Diagram Of Motor Control Unit. This circuit based on the LM317 IC. Features:diodes protect the regulator, ...
The op-amp IC1D shapes the frequency response to amplify those frequencies produced when motion is detected and rejects all others, such as those due to noise or slow temperature changes. When IC1D outputs a voltage higher than 1. 67V, it forces pin 8 and....
The first IC (left) is wired to work around 1Hz. The 47uF capacitor is charged and discharged periodically and the voltage across it gradually increases and decreases periodically...
This is a IBM ThinkPad T40 Power control circuit. This circuit based on the MAX1631 IC. MAX1631 IC is a Multi-Output, Low-Noise Power-Supply ....
DIY TDA2050 Non-Inverting Chip Amplifier (chipamp) Project constructed on a protoboard..
The H-bridge is a circuit used in electronic control of high current devices, particularly where the device polarity may be reversed, e. g. DC motors. The name comes from the fact that the circuit typically looks like a letter "H". The circuit shown has four....
A common topology for DC-AC power converter circuits uses a pair of transistors to switch DC current through the center-tapped winding of a step-up transformer Examine these checkplot images from a PCB drafting program, for a control board based on this....
I am rewiring my entire house after a major malfunction of two antique knob and tube circuits. I`m up against a challenge with some outdoor lights. Here`s the situation: I have a detached garage. It has a porch light over the service door, and it works on a....
Make a sound card is no more a complex issue. If you use great IC PCM2702 from BURR BROWN / Texas Instruments you can create a fully functional USB sound card. This sound card can be powered from USB port and has one stereo output. You don ½t need to install....
There are numerous posts on Instructables about how to make a flickering LED candle. This is my version. The project requires the following components...
The latest addition to my collection of Infra Red (IR) Repeater circuits. The Mark 5 is a much improved version of the Mark 1 circuit and has increased range...
Phonographs are gradually becoming a rarity. Most of them have had to yield to more advanced systems, such as CD players and recorders or (portable) MiniDisc player/recorders. This trend is recognized by manufacturers of audio installations, which means that....
This circuit was submitted by Lazar Pancic from Yugoslavia. The sound card for a PC generally has a microphone input, speaker output and sometimes line inputs and outputs. The mic input is designed for dynamic microphones only in impedance range of 200 to....
The LED meter is simpler and smaller than it`s analogue counterpart, and is very common in audio equipment. This version is based on a National Semiconductor IC, and uses the logarithmic version. Each LED operates with a 3dB difference from the previous one,....
The master mode selection switch is IC6 which switches the 4 mode LEDs (which also correspond to the measured unity, i. e. kHz, counts, milli-seconds or seconds) as well as the input for the divider and the counter : For standard frequency counter mode....
P89LPC901, Vacuum Cleaner, Soft start, Harmonic suppression, Low cost A low cost P89LPC901 based vacuum cleaner system is introduced in this application note. Design hardware and software are fully discussed. This system CAN also guide the design of other....
This article focuses on a minimal resource microcontroller implementation for a 3 phase BLDC motor, closed loop speed motor controller application based on a Microchip PIC12 device. It shows how minimisation techniques can reduce the number of I/O pins to....
This is a minimal circuit which I built to individual of my audio amplifier projects to control the presenter output relay. The end of this circuit is to control the relay which turns on the speaker output relay within the audio amplifier. The impression of....
If sine wave is very essential it can be derived from the square wave. One of the most popular IC used to generate clock from Maxim Integrated Products is MAX9471. Please refer this circuit below to design a clock generator out of this device. This device....
A Cmos Based Motorcycle Alarm Circuit This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automaticall....
This application note describes a controller for a 200 W, 24 V Brushless DC (BLDC) motor used to power an electric bike. The design uses Zilog`s Z8 Encore! MC Z8FMC16100 Microcontroller unit (MCU) and associated circuitry to implement motoring control,....
The old 555 timer will certainly work given the specs you provided, and that`s the way to go if you are sure this is precisely the problem you want to solve. By the way, as Steven mentioned, the general name for this type of timing block is monostable....
A PB-12N23PW-05Q buzzer and I`m trying to use it with ATmega 162. I can`t connect it directly to pin, because from what I`ve read from 162`s datasheet, it can source at most 20 mA. The buzzer takes 50 (or around 25, if we take a look at the graph), so I....
This circuit is able to handle nine independent telephones (using a single telephone line pair) located at nine different locations, say, up to a distance of 100m from each other, for receiving and making outgoing calls, while maintaining conversation....
Nissan Sentra 1.6 Liter Manual Transmission Starter Circuit Wiring Diagram...
The Spartan-3an board has external 5v Relay interfacing, indicated as in Figure. ULN2803 is used as a driver for FPGA I/O lines, drivers output connected to relay modules. PTB connector provided for external power supply if needed...
This is a simple NiCd battery charger powered by solar cells. A solar cell panel or an array of solar cells can charge a battery at more than 80 % efficiency provided the available voltage exceeds the fully charged` battery voltage by the drop across one....
MC44BS374CA: PLL Tuned UHF and VHF Audio Video High Integration Modulator MC44BS374CA The MC44BS374CA Audio and Video Modulator is for use in VCRs, set-top boxes, and similar devices. By Freescale Semiconductor, Inc ..
The circuit was designed to create a frequency generator that consists of 7 steps during the operation. Crystal Oscillator an electronic circuit made of....
The following circuit shows about Simple Battery Charger With The Temperature Sensor. This circuit based on the LM350 IC. Features: negative ....
This circuit of multimedia speakers for PCs has single-chip-based design, low-voltage power supply, compatibility with USB power, easy heat-sinking, low c....
CD4538 is a dual Monostable Multivibrator. When you trigger the chip the output sends off one single pulse or one high-low event. The T+ pin 4 of U1a is the positive edge trigger or raising edge trigger input, the T- pin 5 is falling edge or negative edge....
I got this from a dosing pump control circuit. we use cool IC is no. lm317 circuit, It can uses with power supply source 24VDC and adjust voltage output 1.25V....
ICs that in the past were far too expensive for the hobbyist tend to be more favourably priced these days. An example of this is the AD8099 from Analog Devices. This opamp is available for only a few pounds. The AD8099 is a very fast opamp (1600 V/ms) and....
Stepper motor is a simple way to make a motion control with high precision. A stepper motor control circuit is needed to make stepper motor works. A stepper....
Using LM380 and few external components can be designed a simple audio amplifier that has many features like : wide supply voltage range, 150k © input impedance, low distortion, 1. 3A current capability. ..
Voltage fluctuation is a serious issue in every home. Due to some reasons our supply voltage may rise above 110V or 230V. Flow of this high electricity may lead to the damage of our home electrical devices. Have you thought how electrical protection is....
TDC1808/TDC1809 is a pair of wireless remote control transmitter and receiver component. They use an internal antenna, transmitting digital signals or analog signals. It is suitable for a variety of wireless remote control device. The features are small....
This circuit is intended for children fun, and can be installed on bicycles, battery powered cars and motorcycles, but also on models and various games and toys. With SW1 positioned as shown in the circuit diagram, the typical dual-tone sound of Police or....
This circuit is intended to program AVR controllers such as the AT90S1200 via the parallel port. The circuit is extremely simple. IC1 provides buffering for the signals that travel from the parallel port to the microcontroller and vice versa. This is....
All DAC boards includes supply part. It is enough to connect only power transformer. Here I offer board for toroidal 10VA transformer manufactured by Talema which has pins to the PCB and it has very small radiation of electromagnetic field to the....
A variable power supply with adjustable voltage and current outputs made with the L200 regulator. Using the versatile L200 voltage regulator, this power supply has independent voltage and current limits. The mains transformer has a 12volt, 2 amp rated....
For some ten years Texas Instruments have been developing solid state speech technology with the result that speech can now be produced which faithfully preserves the character of the spoken voice including intonation, accent, dialect, and pitch. Linked to a....
WB5LUA described GaAsFET preamps for several microwave bands which included an active bias circuit for the GaAsFET. Many devices have come along since then which offer better performance, but require a bias point with different current and voltages. It isn`t....
The IC ELM446 is an 8 pin digital divider integrated circuit, that provides both 50Hz and 1Hz outputs from a common 3. 58MHz NTSC colourburst crystal. Externally, the designer need only provide the crystal and two appropriate loading capacitors, as well as a....
The following circuit shows about Bass And Treble Controller Circuit. This circuit built based on the classic Baxandall tone control circuitry ....
Make H-Bridge for controlling DC brushed motor with PWM. One bridge will control 1 DC motor. Bridge will have 3 inputs: A, B and PWM. A and B will be direction control while one PWM signal will control motor speed no matter in which direction it will spin.....
This is a CMOS-compatible (and hopefully also TTL) input featuring over- and under-volatage protection. Schmitt triggers are used to allow for input with long transition times. Verified to work up to 30MHz...
LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems....
This circuit can be used to operate an electric strike or an electromagnetic lock on a door. It is not the door being opened/closed, but a small electromagnetic strike which unlocks the door. The opener has the following features currently programmed in....
Simple, highly sensitive capacitive ON/OFF switch pads change the state of a latch and turn on an LED without requiring actual physical human contact. The pad may be insulated. A range of 12mm is easily obtained and sensitivity is adjustable. Central is the....
The digital sine wave generator (oscillator) circuit has the advantage that only few components are needed to generate signals with high amplitude constants and variable within a very wide range of frequencies. The circuit shown here generates a sinewave....
P1 is the manual control of the corresponding parameter (e. g. tune for a VCO, frequency for a VCF, manual gain for a VCA, manual phase shift for a phaser and so on). P1 generates the voltage U1. J1 is the (first) input socket for the external control....
[caption id=attachment_45 align=alignnone width=500 caption=Serial RS232 to USB][/caption] This is simple RS232 Serial to USB Converter that...
When I began the design of this amp, my goal was to make a product better suited for the reproduction of complex music and voice. Although I emphasize the high electrical properties, the most important requirement is to create a superior sound, vivid images....
Hello, My goal is to control a 12 VDC device (on/off) from a microcontroller using a relay card. The relay needs 12 VDC operating power (I use the....
